Along the scenic Top of the Rockies Byway lies the historic city of Leadville, North America's highest incorporated city (10,430 feet elevation).  Once a booming silver mining town, Leadville is finding renewed life in tourism and outdoor recreation.  The network of rough jeep roads and trails in surrounding high mountains, including the Colorado Trail, offers golden opportunities for bikers.  In addition, Camp Hale and many of the 10th Mountain Huts lie within jumping distance, making Leadville a prime locale for some serious backcountry adventures.  Once a year, the city hosts the Leadville 100 or Race Across the Sky, a grueling 100-mile mountain biking race along some of Colorado's highest roads and trails.